Device for use in the aftertreatment of artificial silk



Sept. 2, 1941. Y J. UYTENBOGAART DEVICE FOR USE IN THE AFTERTREATMENT OF ARTIFICIAL SILK Filed Sept. 8, 1938" 3mm Jo mammals Ur rs/vaoauer Patented Sept. 2, 1941 DEVICE FOR USE IN THE AFTERTREATBIENT OF ARTIFICIAL SILK Johannes Uytenbogaart, Wassenaar, Netherlands Application September 8, 1938, Serial No. 229,038 In Germany September 14, 1937 6 Claims.

The present invention relates to an apparatus for use in the manufacture of filaments of artificial origin primarily and has for its object an improved apparatus for the after-treatment of the filaments. I

More particularly, the present invention concerns a device for use in a continuous production of filaments of synthetic origin.

In the continuous process manufacture of artificial silk the filaments are extruded, drawn, given different after-treatments such as bleaching, desulphurizing", etc., then dried and collected, all these operations being done on one'apparatus. The thread is usually conveyed through the after-treatment steps in an approximately helical path on a roller or rollers, the said treatment being done as the thread passes over such co-nveyor rollers. Such guide cylinders are sometimes in the form of reels, and the helical feeding of the filaments over such reels is achieved either through appropriate movements of the individual lathes on such a reel, or by means of guiding hooks or intermediate guide rollers. Another manner of feeding the threads is to use a plurality of cylinders comprising two or more cylinders slightly angled one to the other, and in this manner achieving a spiral movement of thefilaments from one end of the rollers to the other. The treatment which is performed on these rollers naturally consists of different treating solutions. For example, the threads may first be desulphurized with sulphuric acid during the first portion of their passage over the rollers, and then deacidifled by spraying them with wash water on the last portion of their travels. It is desirable, of course, to recover the acid, if possible, and this may be made easier by keeping the wash water and acid separate.

i It is therefore an object of the present invention toprovide an apparatus whereby different treating solutions may be kept separate, one from the other during after-treatment of the filaments.

This and other objects of the invention will in part become obvious and in part will be pointed out in the following specification and appended claims, when taken in connectionwiththe attached drawing, in which the arrangement of apparatus used in my novel invention is illustrated in a diagrammatic view, parts being shown in section.

In the drawing in which like numerals of reference indicate'like parts, I refers to a spinning nozzle from which is drawn the thread 3.

precipitating bath 2 through which the thread 3 is drawn and coagulated.

A driven roller 4 conveys the thread to in- .clined treating cylinders 5 and 6 which are inthe drip pan ID the acid is carried For the purpose of spraying the thread with I acid on the first portion of its travel on the rollers, a nozzle 8 is provided which is mounted on the end of a supply pipe 9. The acid which is sprayed on the toproller 5 spreads in a film down over the surfaceof this cylinder and the loops of thread conveyed thereon. The acid,.as it flows down over the cylinder, drips down over the edge thereof and is caught by a drip pan In. From off by a drain pipe ll.

A supply pipe I2 carries water to a nozzle 13 which sprays the lower cylinder 6 in -a regulated quantity so that no splashing of the water results. The water flows down in an even film'over the roller 6 and across the thread winding to a flange or continuous baflie [5 which is mounted in proper position on the lower roller 6. further positioned on the roller in a place where the thread going from below has just passed the acid area.

The flange l6 may be made of any suitable material, such as hard rubber, Bakelite, acid proof metals, and the like.

It is readily apparent that the water, as it flows downward,'will be intercepted by the flange l6 causing it to drip from the roller before mixing with the acid. h

In order to insure that the water will not pass to theopposite side of the flange 46 the peripheralsurface of the flange may be provided with one or more grooves II.

It may be also found more advantageous to provide a wiping device for removing the liquid from the peripheral surface of the said flange l6. For this purpose, a pivotal arm I8 is provided which carries at its end a felt block 19; and the arm I 8 is spring held in any suitable manner against the edge of the flange [6, as by tension The nozzl I is immersed in the spinning or spring 20. The useof such a flange does-n 1; in

The flange I6 is any way hinder the operation of the apparatus or the passage of the threads around the conveying cylinders. By the use of such a flange and wiping device, it is obvious that different treating liquids may be kept entirely separate, one from the other, thus resulting in a considerable saving by reason of facilitating the recovery of the said treating liquids.

It is obvious that many variations may be made in the apparatus in the described arrangement while utilizing the invention of the present application, and it is not intended to restrict the invention to the particular description or example given herein. The terms used in describing the invention have been used in a descriptive sense and not as terms of limitation, and it is intended that all equivalents thereof be included within the scopeof the appended claims.

What is claimed is:

1. In an apparatus for use in the treatment of threads, a roller over which threads are spirally passed, means for independently wet-treating different portions of said roller, and a continuous flange encircling said roller and arranged to separate the treating solutions applied to adjacent portions thereof.

2. In an apparatus for use in the treatment of threads, a roller over which threads are spirally passed, means to wet-treat difierent portions of said roller and a circular flange mounted on said roller to keep separate the different treating solutions used, said flange having at least one groove formed in the periphery thereof.

3. In an apparatus-for use in the treatment of threads, a roller over which threads are spirally passed, means to spray different portions of said roller with treating solutions, at least one circular flange mounted on said roller to keep separate the diiferent treating solutions, said flange having at least one groove formed in the periphery thereof, and means to wipe the periphery of the said flange.

4. In an apparatus for use in the treatment of threads, a roller over which threads are spirally passed, means to spray difi'erent portions of said roller with treating solutions, at least one circular flange mounted on said roller to keep separate the difierent treating solutions, said flange having at least one groove formed in the periphery thereof, and a wiper held in contact with the periphery of said flange.

5. In an apparatus for use in the treatment of threads, a'roller over which threads are spirally passed, means to wet-treat different portions of said roller, and an outwardly extending continuous baiiie encircling said roller and adapted to separate the different treating liquids used.

6. In an apparatus for use in the wet-treatment of artificial threads, a roller over which said threads are spirally passed, means to apply treating liquids to different portions of said roller, and a baffle ring surrounding said roller and rigidly secured to the surface thereof between the zones of liquid treatment.

J OHANN ES UYTENBOGAART. 

